/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.view.pulltorefresh;

import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.util.AttributeSet;
import android.view.View;
import android.widget.HorizontalScrollView;
import app.twotiger.p2p.R;

public class PullToRefreshHorizontalScrollView extends PullToRefreshBase<HorizontalScrollView> {

    public PullToRefreshHorizontalScrollView(Context context) {
        super(context);
    }

    public PullToRefreshHorizontalScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public PullToRefreshHorizontalScrollView(Context context, Mode mode) {
        super(context, mode);
    }

    public PullToRefreshHorizontalScrollView(Context context, Mode mode, AnimationStyle style) {
        super(context, mode, style);
    }

    @Override
    public final Orientation getPullToRefreshScrollDirection() {
        return Orientation.HORIZONTAL;
    }

    @Override
    protected HorizontalScrollView createRefreshableView(Context context, AttributeSet attrs) {
        HorizontalScrollView scrollView;

        if (VERSION.SDK_INT >= VERSION_CODES.GINGERBREAD) {
            scrollView = new InternalHorizontalScrollViewSDK9(context, attrs);
        } else {
            scrollView = new HorizontalScrollView(context, attrs);
        }

        scrollView.setId(R.id.scrollview);
        return scrollView;
    }

    @Override
    protected boolean isReadyForPullStart() {
        return mRefreshableView.getScrollX() == 0;
    }

    @Override
    protected boolean isReadyForPullEnd() {
        View scrollViewChild = mRefreshableView.getChildAt(0);
        if (null != scrollViewChild) {
            return mRefreshableView.getScrollX() >= (scrollViewChild.getWidth() - getWidth());
        }
        return false;
    }

    @TargetApi(9)
    final class InternalHorizontalScrollViewSDK9 extends HorizontalScrollView {

        public InternalHorizontalScrollViewSDK9(Context context, AttributeSet attrs) {
            super(context, attrs);
        }

        @Override
        protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY,
                                       int scrollRangeX, int scrollRangeY, int maxOverScrollX,
                                       int maxOverScrollY, boolean isTouchEvent) {

            final boolean returnValue = super.overScrollBy(deltaX, deltaY, scrollX, scrollY,
                scrollRangeX, scrollRangeY, maxOverScrollX, maxOverScrollY, isTouchEvent);

            // Does all of the hard work...
            OverscrollHelper.overScrollBy(PullToRefreshHorizontalScrollView.this, deltaX, scrollX,
                deltaY, scrollY, getScrollRange(), isTouchEvent);

            return returnValue;
        }

        /**
         * Taken from the AOSP ScrollView source
         */
        private int getScrollRange() {
            int scrollRange = 0;
            if (getChildCount() > 0) {
                View child = getChildAt(0);
                scrollRange = Math.max(0, child.getWidth()
                                          - (getWidth() - getPaddingLeft() - getPaddingRight()));
            }
            return scrollRange;
        }
    }
}
